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Added 4 hours ago
TS
Senior Java Developer
Triunity Software
Toronto, ON
- $100,000 to $110,000 CAD / year
- Full-time
Triunity Software is looking for a talented and driven Senior Java Developer to join our growing team in Toronto, ON. This is an exciting opportunity to work on cutting-edge software…
Added 5 hours ago
PH
Intermediate Software Developer
Propel Holdings
Toronto, ON
- Full-time
5-7 years of hands-on experience as a software developer (Java + Spring Boot + Hibernate/JPA + REST)
Added 5 hours ago
M
Senior Software Engineer - Credit Commercial Engineering
Marqeta
Remote, Canada
- Full-time
- Remote
Debug critical production issues across services and different stack levels.
Added 6 hours ago
AS
Full Stack Designer /Developer
Apex Systems
Toronto, ON
- $55 to $80 USD / hour
- Contract
We are seeking an Expert Full Stack Developer to design, build, and maintain both front-end interfaces and back-end systems, including APIs, microservices, databases, and cloud deployments.…
Added 8 hours ago
LI
Software Developer - Back End
Lotus IT Solutions
Toronto, ON
- Contract
Integrate front-end elements into server-side applications and support full-stack collaboration
Added 9 hours ago
OT
Sr. IT Software Developer
Open Text Corporation
Waterloo, ON
- Other
As a Sr. IT Software Developer (Digital Fullstack), you will independently deliver full-stack and platform capabilities for OpenText's digital experience ecosystem. You will work across…
Added 12 hours ago
C
Full Stack Developer
CGI
Vancouver, BC
- Full-time
CGI is seeking a Full Stack Developer to design, develop, test, integrate, and support modern enterprise applications.
Added 12 hours ago
D
Senior Full Stack Developer (Java And React/Angular) - Operate (Future Opportunity)
Deloitte
Toronto, ON
- Full-time
We are passively seeking Full Stack Java Developers to join our team on a 1-year fixed term. As a Full Stack Java Developer at Deloitte, you will play a crucial role in designing,…
Added 12 hours ago
BV
Data Engineer (Sports & Prediction Markets)
Betstamp Ventures
Toronto, ON
- Internship
…and historical feed that drops into their existing trading…
Added 12 hours ago
RI
Senior Full Stack Java Developer - Capital Markets
Rose International
Mississauga, ON
- Full-time
8+ years of professional software engineering experience, with demonstrable experience as a Full-Stack Developer transitioning into a Forward Deployed Engineer-style, customer-facing…
Added 12 hours ago
LB
Senior Software Engineer, Agentic AI Products
Leo Berwick
Toronto, ON
- Full-time
Full-stack proficiency. You are strong in React, TypeScript, and Java, and comfortable picking up other languages, such as Python, as the work demands.
Added 12 hours ago
ZC
Senior Full Stack Developer (Angular & Java)
Ztek Consulting
Montreal, QC
- Full-time
You will be a technically proficient and enthusiastic developer, with a desire to work on back-end application development.

Lotus IT Solutions

Software Developer - Back End

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Nov 29, 2026
Posting language: English
Posted: Oct 30, 2026

Original job description

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Ref: RQ11429 Contract – 9 Months (Extension Possible) Onsite – Toronto (222 Jarvis Street)

Posted Date: 2026-10-30

Location: Onsite – Toronto (222 Jarvis Street)

Public Sector Experience: Required – OPS / Public Sector

Contract End Date: 2027-05-31 *

Rate: $99/hour

Overview

The Government Services Integration Cluster (Ministry of Public and Business Service Delivery and Procurement) is seeking a Senior Back End Software Developer for an onsite engagement in Toronto. The successful candidate will be responsible for designing, developing, and maintaining server-side logic and database architecture for large-scale, multi-client web applications. This role operates within an Agile delivery environment and requires close collaboration with front-end developers, architects, and cross-functional project teams.

Key Responsibilities

Design and develop robust server-side logic, central database definitions, and ensure high performance and responsiveness to front-end requests
Translate technical systems specifications into working, tested, and well-documented applications
Develop detailed programming specifications and write or generate production-quality code
Build and maintain RESTful APIs and RESTful Web Services to support front-end and third-party integrations
Integrate front-end elements into server-side applications and support full-stack collaboration
Apply microservice architecture principles to enhance product extensibility, maintainability, and scalability
Work with relational and hierarchical databases (Oracle, SQL) including data retrieval using query languages
Implement and enforce security protocols including JWT, OAuth 2.0, and SSL Certificates
Conduct unit testing, compile data-driven programs, and perform debugging and troubleshooting of technical issues
Participate in design walkthrough sessions and contribute to code reviews with the project team
Support post-implementation activities and resolve technical issues as they arise
Follow OPS development standards and contribute to Agile ceremonies and sprint delivery

Must-Have Requirements

10+ years of experience as a designer and developer on large-scale, multi-client web applications
10+ years of hands-on Java development experience with Oracle or SQL databases
5+ years of hands-on experience with REST APIs and RESTful Web Services
Extensive experience in modern web framework technology stack: React, JavaScript, Next.js, Node.js, CSS, and RESTful APIs
Extensive experience with responsive web development and HTML5
Extensive experience coding for mobile devices
10+ years of experience developing applications in compliance with PCI and WCAG 2.2 standards and achieving AODA compliancy
Experience with JAWS, WAI-ARIA, and HTML5 for accessible application development
Knowledge and experience with microservice architecture and core architecture principles
Experience using Azure DevOps for source control, CI/CD, and project management
Knowledge of security gateways and protocols including JWT, OAuth 2.0, and SSL Certificates
Strong understanding of Agile methodologies and object-oriented coding practices including design patterns, refactoring, and clean code principles

Nice-to-Have Skills

Previous experience developing and supporting Driver, Vehicle, Healthy Smiles Ontario, and High Occupancy Lanes services within the ServiceOntario web portal
Experience with Canada Post Address module and Government Payment Gateway integrations
Knowledge of rapid application development (RAD) methodologies
Experience with middleware and gateways
Familiarity with OPS development standards and processes
Prior Ontario Public Sector or broader public sector development experience

Work Environment

This is a fully onsite role based in Toronto at 222 Jarvis Street, five days per week. No security clearance is required. The team follows Agile methodologies and the consultant will work closely with both functional and technical team members throughout the software development life cycle.

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Final role details, responsibilities, and terms will be confirmed with shortlisted candidates. Compensation may vary based on experience. Errors and omissions excepted.

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More about this job

Responsibilities

Design, develop, and maintain server-side logic, database architecture, and RESTful services for large-scale web applications, ensuring performance, security, and accessibility. Collaborate with front-end developers and cross-functional teams in an Agile environment, while testing, debugging, reviewing code, and supporting post-implementation activities.

Requirements

Requires 10+ years of experience developing large-scale web applications and Java applications with Oracle or SQL, plus at least five years working with REST APIs and web services. Candidates must also have extensive experience with modern web technologies, responsive and mobile development, PCI and WCAG 2.2 compliance, accessibility tools, microservices, Azure DevOps, security protocols, and Agile practices.

Skills

Java
Oracle
SQL
REST APIs
React
JavaScript
Next.js
Node.js
CSS
HTML5
Responsive Web Development
Mobile Development
Microservices
Azure DevOps
Web Accessibility
Agile Methodologies

Visa sponsorship

Not detected in the job text

Keywords

Java
Oracle
SQL
REST APIs
RESTful Web Services
React
JavaScript
Next.js
Node.js
CSS
HTML5
Responsive Web Development
Mobile Development
Microservice Architecture
Azure DevOps
CI/CD
PCI Compliance
WCAG 2.2
AODA
JAWS
WAI-ARIA
JWT
OAuth 2.0
SSL Certificates
Agile
Object-Oriented Programming
Design Patterns
Refactoring
Middleware
Government Payment Gateway

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